High Budget Trailers

I wanted to research some high budget films to see what they spent their money on, if it was worth it and mainly to see if it was effective.
I know I will never be able to produce a high budget film, considering I am a student, however I feel it is good to research to see if I can try to produce a teaser trailer which looks high budget but it really low budget.
The trailer which I find effective with a high budget is the Black swan. The ending is the part I like the most because it is what we are trying to do with ours. Although this is different, this doesn't have the black outs in between. This is a new idea which I feel could work, because it has been so effective in this trailer.

The trailer -

Another high budget film trailer for the horror genre is Sorority row. However I feel this trailer doesn't show the best part of the film. Also it doesn't show the money which went into it.

Personally I feel this doesn't draw the audience into the film and make them want to watch it.